function randomFromTo(from, to){
       return Math.floor(Math.random() * (to - from + 1) + from);
}
function in_array (needle, haystack, argStrict) {
    var key = '',
        strict = !! argStrict;

    if (strict) {
        for (key in haystack) {
            if (haystack[key] === needle) {
                return true;
            }
        }
    } else {
        for (key in haystack) {
            if (haystack[key] == needle) {
                return true;
            }
        }
    }

    return false;
}